Fig 12 sh - Study guides, Class notes & Summaries

Pepsin is a protease enzyme with a polypeptide chain containing 327 amino acids. Titin is the largest known protein. It has a polypeptide chain containing at least 92 times more amino acids than pepsin. (i) DNA sequences in genes code for polypeptide molecules such as pepsin and titin. Explain why a process known as transcription is necessary for polypeptide synthesis - ANSWER DNA, copied to mRNA DNA, is too large to leave nucleus Calculate the minimum length of the DNA base sequence r...

AS Level Biology A H020/02 Depth in biology Tuesday 6 June 2017 - Afternoon Cell B in Fig. 1.1 was observed using an electron microscope. Give one piece of evidence from Fig. 1.1 that supports this - Correct Answer organelles can be seen in more detail Give one way that an image produced by a laser scanning confocal microscope differs from that produced by an electron microscope - Correct Answer laser scanning confocal microscope has lower resolution Meiosis is a type of nuclear division....